Wang Hongyang, Ye Dong, Li Aokang, Zhang Bo, Guo Wang, Wang Baoli, Wang Ziru, Wu Qingshuang, Zhao Chenyang, Zhang Guan-Jun, Huang YongAn
State Key Laboratory of Intelligent Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, P.R. China.
Flexible Electronics Research Center, Huazhong University of Science and Technology, Wuhan 430074, P.R. China.
Nano Lett. 2024 Aug 7;24(31):9511-9519. doi: 10.1021/acs.nanolett.4c01926. Epub 2024 Jul 23.
Electrohydrodynamic printing holds both ultrahigh-resolution fabrication capability and unmatched ink-viscosity compatibility yet fails on highly insulating thick/irregular substrates. Herein, we proposed a single-potential driven electrohydrodynamic printing process with submicrometer resolution on arbitrary nonconductive targets, regardless of their geometric shape or sizes, via precoating with an ultrathin dielectric nanoparticle layer. Benefiting from the favorable Maxwell-Wagner polarization, the reversely polarized spot brought about a significant drop (∼57% for ceramics) in the operation voltage as its induced electric field and a negligible residual charge accumulation. Thus, ordered micro/nanostructures with line widths down to 300 nm were directly written at a stage speed as low as 5 mm/s, and silver features with width of ∼2 μm or interval of ∼4 μm were achieved on insulating substrates separately. Flexible sensors and curved heaters were then high-precision printed and demonstrated successfully, presenting this technique with huge potential for fabricating flexible/conformal electronics on arbitrary 3D structures.
电流体动力学打印具有超高分辨率制造能力和无与伦比的油墨粘度兼容性,但在高度绝缘的厚/不规则基板上却存在不足。在此,我们提出了一种单电势驱动的电流体动力学打印工艺,通过预涂覆超薄介电纳米颗粒层,可在任意非导电目标上实现亚微米分辨率的打印,而无需考虑其几何形状或尺寸。得益于有利的麦克斯韦-瓦格纳极化,反向极化点由于其感应电场导致操作电压显著下降(陶瓷约为57%),且残余电荷积累可忽略不计。因此,线宽低至300 nm的有序微/纳米结构能够以低至5 mm/s的阶段速度直接写入,并且在绝缘基板上分别实现了宽度约为2 μm或间距约为4 μm的银图案。随后,柔性传感器和曲面加热器被高精度打印并成功展示,表明该技术在任意3D结构上制造柔性/共形电子器件具有巨大潜力。
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